Weird Backfiring/Hard Starting/Rough Idle Issue

[954M3]

I can’t figure out what the issue is.

Symptoms:
- Car takes long to crank or takes 3 tries to turn on after getting gas
- Weird idle
- Cold start after gas holds at like 1500rpm
- Constant backfiring
- DTML Leakage error
- Fuel Cap error

All these things are intermittent except the backfiring.

Ive replaced a faulty ignition coil
Changed all my O2’s (still getting errors for front 2)

Somebody please help! Im sure its a fuel issue. Ive changed my fuel breather valve before and didnt have the backfiring issue or the issue with starting the car after gas. The backfiring is aggravating cause I hate burble tunes and it sounds like one.